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At Sequent, our approach is to utilize the focused experience we have in working with families and their businesses.  As a comprehensive multi‐family office, we specialize in helping families who have, had, or will have their own business; be it a multi‐generational family owning and running a closely held business, a high ranking corporate executive of a publicly traded or privately held company, or a professional with  their own practice.


Sequent provides Family Office Wealth Management, Investment Management, Financial Counseling, and Portfolio Consulting and Fiduciary Coordination services to individuals, including closely held business owners, senior corporate executives, retirees, trusts, estates, charitable organizations and corporations or other business groups.


Sequent was formed in 2008 as a multi‐family office and professional investment management firm by Tim Hartzell and David Doll.  As partners, we decided early on that what we were seeking to create was a boutique firm, a firm focused on serving highly ranking corporate executives, professionals and families that have, had or will have a closely‐held business.

We decided to be selective in who we work with, ensuring for our clients that our differentiation would truly be not what we do, but rather what our clients do and how we help them to do it better.  We strive to provide client comfort and trust by being intimate, and connected with each family. We travel extensively to know and be a part of our clients’ lives, working with over thirty plus families in over a dozen states and several countries.

Proud to be celebrating fifteen years in 2023!


Tim S. Hartzell

Founder & Manager, Chief Investment Officer & Chief Compliance Officer

Tim is a Founder and Manager, and the Chief Investment and Chief Compliance Officer of Sequent.  Tim heads up the investment operation as well as overseeing compliance for the firm.  As the CIO, Tim chairs the Investment Committee and is responsible for the formation of investment policy, strategy, selection and implementation for client accounts.  Prior to his founding Sequent in 2008, Tim was the Chief Investment Officer for Legacy Asset Management and Kanaly Trust Company.  Tim was also the Southwest Regional Director of Wells Fargo’s Institutional Trust Group.

Tim holds a BA in Business Administration with a concentration in Economics and Finance from the University of Mount Union, a Master of Science in Banking and Financial Services from Boston University, is a Chartered Financial Analyst (CFA) and a graduate of the Harvard Business School’s executive program of Investment Management.  Tim has completed the American Bankers Association’s National Graduate Trust School at Northwestern University and the Asset/Liability Management School at the University of Colorado, Boulder.  Tim serves as an Arbiter for the Financial Industry Regulatory Authority (FINRA) and a lecturer for the Chartered Financial Analyst study review course for Kaplan Professional Education Corp.

Tim has over 40 years of experience in investment management.  Tim has appeared on CNBC and Bloomberg Television and frequently provides economic and market commentary for Bloomberg Radio.  He has been quoted in the New York Times and Smart Money, and by Bloomberg and Reuters news services.

David M. Doll

Founder & Chief Executive Officer

David is a Founder and the Chief Executive Officer (CEO) of Sequent.  His primary responsibilities relate to the coordination and management of client family financial affairs.  David is also the President and Chief Executive Officer of L.E. Jones Company, Inc.  Prior to his founding of Sequent in 2008, David was with Kanaly Trust Company for nearly twenty years, where he rose to become  the firm’s President and CEO for five years as well as heading both its investment and trust  committees.  He also was a Regional Manager for Boatmen’s Trust Company of Texas, and before that, a Management Consultant for KPMG Peat Marwick.  David holds both undergraduate and graduate business degrees from the University of Houston with concentrations in finance and tax, respectively.  David is an honors graduate from the National Graduate Trust School at Northwestern University in Chicago, Illinois where he earned the Certified Trust & Financial Advisor designation, and he has attended Harvard Business School with multiple certificates in Board Governance.

David has been quoted in the Wall Street Journal, Forbes, the Houston Chronicle and Houston Business Journal and other newspapers and magazines and he is a frequent guest on CNBC and Bloomberg Television.  His area of expertise is his knowledge and 35 years of experience in working with families who have operating businesses in the US and overseas as well as with corporate executives leading significant public and private companies.  He is recognized and called on as an expert in the areas of succession planning and strategic leadership within family businesses along with taxation and trust and estate matters where he has been called on to provide expert witness testimony and support in complex fiduciary litigation.

Jacob Grow

Personal Financial Associate

As the newest member of the Sequent team, Jacob joined the firm in 2022 as an Associate. Jacob handles a variety of investment and wealth management projects, alongside Tim Hartzell and David Doll. Jacob is a contributing member of Sequent’s Investment and Marketing committees and Chair’s the firm’s new Business Development Committee. Prior to his career with Sequent, Jacob obtained a Bachelor of Arts in Finance with a secondary major in Management from the University of Mount Union in Ohio. While attending Mount Union, Jacob was a student athlete on the swim team and held leadership roles in various organizations including the Investment Team, Esports team, Student Senate, and his fraternity. After graduation, Jacob worked as a buyer for a manufacturing company joining Sequent.

Donna Parker

Senior Admin

Donna joined Sequent at its founding in 2008 and is primarily responsible for day to day client administrative matters.  Prior to joining Sequent, Donna worked at Kanaly Trust and specifically served David as his executive assistant regarding both corporate and client matters for over seven years.  Donna serves as a direct company liaison to various corporate custodians on behalf of client families.  Donna is a graduate of George Washington University in Washington, DC.